Counterweighted door.



S. A. EGEKWST. EOUNTERWEIGHTED DOOR.

APPLICATION FILED JUNE 23. TQM).

iafenred Oct. 24,1916.

unirnn snares onset/in.

SOBEN A. EGEKVISE OF MINNEAPOLIS, MINNESOTA;

ooUn'rERWnIeH'rED DOOR.

specification of Letters Patent.

Patented Oct. 24, 1916.

. Application filed June 23,1916. Serial No. 105,320.

'0 (Fl whom it crazy concern I Be it known that I, SOREN A. EGEKVIST, a citizen of the United States, residing at ll'linneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Counterweigrhted Doors; and I do hereby declare the following to be a. full, clear, and exact.

description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in counterweighted doors; and, to this "end, it consists of the novel devices and combinations of devices hereinafter defined in the claims.

In the accompanying drawings, which described. and

illustrate the invention, likecliarzictei-s iiidicate like parts througl'iout the several views.

Referring to the drawings. Figure l is a front elevation of a bakers proof-box, having the invention incorporated therein;

2 is a transverse vertical section'taken on the line 2-*2 of Fig. 1 with some parts shown iii-diti'erent positions by means of broken lines; Fig, 3 is a detail view, prin- 'cipally in vertical section taken on the line 3 of Fig. 1, on an enlarged scale; and Fig. l is a detail view, principally in horizontal section taken on the line 4--lof Fig. l. on an enlarged scale.

In the drawings, the invention is shown incorporated iii-a, bakei"s proof-box, but it is, ot'ccnirse, understood that tl e same may be used in connection with any other door o iening, wherein such a door would be of use. Proof-boxes, as is well known, are :tor

holding bread, rolls, etc, during the raising thereof,- and are heated .by introducing steam therein.

The .proof-box'l is a rectangular sheet metal structure, having its entire front open -toafi'o1td a door opening therefor.

This proof-box 1 is supported ina skeleton frame 2, having a rectangular casing 3 and a door sill -l for the door opening thereof. Within the-proof-box l, is a multiplicity of imperforate shelves 5 on which the bread and rolls are placed. For the purpose ol? this case, it will not he necessary to illustrate the lllzUlS for heating the proof-box 1.

" The improved counterweighted door coinprises upper and lower sections 6 and 7,- respectively, connected by hinges 8 at their adjacent horizontal edges for outward swinging movement. W'hen the door is closed, the sections thereof are alined and in fiat eiigagement with the outer face of the casingfi and overlap the same to afford a tight joint therebetween It is important to 'note that; the lower door section 7 is slightly longer than the upper door section 6. I

Angle irons 9 are secured to the uprights ot the casing 3 to afford therebetween chan nel guides 10. Metal faced filling strips 11 are placed between the angle irons 9 and easing 3 to reduce the depth of the channels 10 and also assist in rigidly securing said angle irons to the casing. A'h'orizontal hinge rod 12 has its ends JIIOIIHtQCl in the' filler strips 11 and rearwardly projecting flanges of the angle irons 9. The door sections (3 and 7 are suspended from this hinge rod 12 over the door sill l for vertical swinging movement by ayo'kedike hinge plate 13,

which straddles said hinge rod, embraces the upper horizontal edge portion of the upper door section. 6 and is rigidly secured thereto,

Secured to the lower corners of the lower door section '7, is a pair of roller-equipped trunnioiis H, which extend into the vertical. guides. 10 and connect said door section thereto for pivotal and vertical sliding movements. From the above description, it is evident that the hinge connections 8, 12-l3 and the trunnions 1 connect the improved door to the casing 33, for toggle-like opening and closing movements.

Three arms 15 are secured to the outer face or the upper door section 6 and their upper end portions are oifsetoutward therefrom and extended above the proof-box 1,

A counterweight -16 injthe form of a horizontal bar, is rigidly secured tothe upper extremities of the arms This-counter- 'weight 16, being located. outward of the vertical plane through the hinge rod 1:2,

'c i'ght l6 i'ea'rwardlot said vertical Successful use and whether it is desirable to completely open the door or only partly 'open the same.

When the improved door is moved to its extreme open position, as shown by broken lines in Fig. 2, the sections thereof are in substantially parallel relation, with respect to each other, and slightly out of a true horizontal position. The slightly increased length of the lower door section 7 over the upper section 6 permits said sections to assume this relation, when in extreme open position. A stop rail 18 on the top of the frame 2 is engaged by the arms 15, when the door is completely open, to prevent the counterweight 16 from coming into contact with the top of the box l or frame 2.

The above described door has been put in has proven highly effiview.

What I claim is 1. The combination with a door opening and a casing therefor, ofa door for the door opening comprising upper and lower sections, hinges connecting the upper door section to the casing and the one door section to the other for. vertical-opening and closing movements, means connecting the lower door section to thecasmg wlth freedom for vertical sliding'and pivotal movements, and a counterweight on the upper door section and movable from one side to the other of the vertical plane through the hinge connecting the upper door section to the casing.

2. The combination with a door opening and a casing therefor, of a door for the door opening comprising upper and lower sections, said lower door section being slightly longer than the upper door section, a horizontal hinge connecting the upper door sec tion to the casing, a hinge connecting the two door sections, means connecting the lower door section to the casing for pivotal and vertical sliding movements, an arm car.- ried by the upper door section, and a counterweight on the upper door section and movable from one side to the other of the vertical plane through the hinge connecting the upper door section to the casing.

In testimony whereof I aitix my signature in presence of two witnesses.

SOREN A. EGEKVIST.

Vitnesses:

CLARA DnMAnEsT, HARRY D. humour. 

